55161205 has 8 divisors (see below), whose sum is σ = 72211104. Its totient is φ = 40117200.

The previous prime is 55161203. The next prime is 55161229. The reversal of 55161205 is 50216155.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 55161205 - 2¹ = 55161203 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 55161205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55161203) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 501411 + ... + 501520.

It is an arithmetic number, because the mean of its divisors is an integer number (9026388).

Almost surely, 2^55161205 is an apocalyptic number.

55161205 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

55161205 is a deficient number, since it is larger than the sum of its proper divisors (17049899).

55161205 is a wasteful number, since it uses less digits than its factorization.

55161205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1002947.

The product of its (nonzero) digits is 1500, while the sum is 25.

The square root of 55161205 is about 7427.0589737796. The cubic root of 55161205 is about 380.6664321187. Note that the first 3 decimals are identical.

The spelling of 55161205 in words is "fifty-five million, one hundred sixty-one thousand, two hundred five".